If the north poles of two bar magnets are brough+(ckeiz si*l5tb .; .cdfwk 8tt close to each other, the magnets wi5w.8( f+*dil;c ik bkec.sttzll

  If the south pole of one bar magnet is broughtt8r,4qgv kxl +g 2 +uv(hoz8gv near the north pole of a second bar magnet, the two magnetrh t2+(v8uq vlg4x,v8zg +ogks will

  If a bar magnet is divided into two equal pt 2 2 ,tnivcp.*zis,pk epb/-qieces,

  The Earth's geographic North Polnwvoe4; 27yzxv 6m9zhe is magnetically a

  The south pole of a magnet points toward the Eas l2 iqu1-jh+;*ccbrmrth's

  An electric current pra;w* kmdkf:gkpcf5 42oduces

  Which of the followinwyhh3 9ns6ym9ak y/v 4g is correct?

  A vertical wire carries a cur 6sq .-al-)mvlm*n arwrent straight down. To the east of this wire, the magnetic field poi-.n )wa6lmasr*v-l q mnts

  A horizontal wire carries a current straight toward you. From your point of vio 0 c /oobc5q/zv8:wurew, the magnetic field ca5/z: 0c /qvcr uo8oowbused by this current

  A current carrying loop of wire lies flat on a table top. When viewed frpc: hfi0r -e)uf3oqv 0om above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this currefvh0) ur3o0peq-cfi: nt, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table toxt5*9j 3iu hrqq 8e)gc1 gj7dqp. When viewed from above, the current moves i3 )* gucextr 9dj8q1hqj qg75around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is z,m*,oih /gdu the

  1 T is equivalent toc sf3+6qv zb8z3ampq0

  The direction of the force on a cu,2lax *cdv oqqk8)y-w rrent-carrying wire in a magnetic field is descokwy ,*dx2l8- vcq)aq ribed by which of the following?

  The force on a current-carrying wire in a magneticj vqva a2hy/mq3s)/0f field is the strongest when

  The force on a current-carrying wire in a xf-mud62dn-w e o;yoq,yh9. cmagnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where thee jnpdb0s78ubk- z+brc xxx036jd:7 g magnetic field vector points due north. What is the direxd7gd:j8s k3 +jxn0ceu07 br6 pb- bxzction of the resulting force on this current?

  A charged particle movesqfwlm3r0 /3piey5j 4nb+q f+ w and experiences no magnetic force. From this we can concr 3mfbl+ewwn q30/f4 5p+qjiy lude that

  A charged particle movesgqtb1x: faz qe5z-o0 : with a constant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on tq-tz a bo0:1:q x5gefzhis particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnetic f8:,fdg rm3sm gufu7z+orce on this particmdu+rg,f7 muzs:f g83le

  A charged particle is injected into a unifoz-w vy0epk4 )9yj 3znxrm magnetic field such that its velocity vector is perpendicular to the magnetic fielde4yz )0kn9zpj-wvy x 3 vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a uniform) lb ncu0w3 df9e+q71 uh0uk2s anbf/w magnetic field. If the particle had been traveling twice as fast, the radius of the circular w+7eld00wbf3 fab1u/u snn 9hq2ck) upath would be

  A particle carrying a charge of +e travez.fc22yn4q u gls in a circular path in a uniform magne 22czgu4n.yqftic field. If instead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves o5muao9 bi6w11hdq 5v eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force that 1uviodb 1hw 95moaq65acts on it is

  An electron has an initial velocity to the south but is observed to curve upwa7trppim ;o k m*dp;(9brd as the result of a magnetic fikimo bpm t*p;7;pd( r9eld. The direction of the magnetic field is

  An electron moving along the +x axis entere p* jyv.9vyo-jl*kkl5e 1 vk/s a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to right, +y up, and +z out ovkkv -y*o5eljpj e9vk l1*./yf the page.)

  The magnetic field produced by a long str *u*ey577 *vvmenw6 hgp3lmvbaight current-carrying wire is

  At double the distance from a long current-carrying wire, the streth1vggi-v*. dngth of the magnetic field .v1*iv- dhggtproduced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal s 7lcz,6(l egntable carry identical size currents in opposite di7l6(c,n ezgls rections. The wire on your right carries current toward you, and the wire on your left carries current away from you. From your point of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed side-by-o*8mj (.ww-jvku wk2q.l h1krside on a horizontal table carry identical current straight toward you. From your point of view, the magnetic fiew2v k8kj.wo jmu(q-* w.hr1lk ld at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnd 9.,rb4 vlyooitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between the 4o.9o r,dvlyb two wires?

  A long straight wire carries curr-p ztvuzoi t- 50(q(zqqae1 e5ent toward the east. A proton moves toward the east alongside and just south of the wire. What is the direction of the force on the pro qz- -0vao5zi1pu5 etteq (qz(ton?

  A wire lying in the plane of the page carries a current toward the botto7p 6u t b3ty)0hk6-* ywfe(ue i(qvuckm of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the wire, also in the plane of the ppy7wce e0fkvkt(-qi6 u( )yhu63ubt*age, from your right?

  Two long parallel wires are placed side-by-side.rddj+ndt 2a4sz8b i)-dg ff/ on a horizontal table. If the wires carry currenbza4 nfi +/sg jrf2dd)td.d-8t in the same direction,

  Two long parallel wires are placed side-by-side o;c3jwnl 2 w*po ,bq iik8t)q.jgm 5o1kn a horizontal table. If the wires carry curr li2p1jwcoqm t8on jg;i ,5k.w*3)kqbent in opposite directions,

  Consider two current-carrying circular loops. Both are made from one stranhkicd jv.v01 i8. qmq4d of wire and both carry the same current, c0j.iiq41mdv8qh vk . but one has twice the radius of the other. Compared to the magnetic field at the center of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying ci1xn yppd*4 hx9rcular loops. Both are made from one strand of wire and both carry the same current, but one has twice hpdxnp x9*y4 1the radius of the other. Compared to the magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the angle betwebql m3o*(1j)x eypt6fen the loop's magnetic moment atef)b (yjx*1lm3 o 6pqnd the magnetic field vector is

  When placed askew in a magnetic field, a current caxmm9x 7 qx5:8gldvexod(y 8k2 rrying loop that is free to rotate in any direction will experience a torque untiyx :elx87 9dmxv(8xo m5k2dqgl its magnetic moment vector

  What fundamental fact underaurx 1d5g7o+d z1qrf* lies the operation of essentially all electric motors?rz1 uogqf1x7*5ra dd +

  A circular wire loop lies in a horizontal plane on a tgj k;z+rf1 *e/ )4hpr.ltenjm able and carries current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field points to the north and dips below the horizontal. Which side of the coil tends to lift off of the table because of the torque caused by the currents interaction with the magnetic fint;f4elkmg 1p h* )zj.+ rre/jeld?

  In a mass spectrometer a particle 7fnt7 -(jlgld8rbz 198hhezmof mass m and charge q is accelerated through a potential difference V and allowed to enter a magnetic field B, where it is deflected in a semi-circular path of radius R. The magnetic field is uniform and oriented perpendicular to the velocity of the particle. Derive an expression for the mass of the particle in terms of B, q, V,-t lzj7 9her7dhz lgf(81 b8mn and R.

  A velocity selector consistp ytux) :57wn91dlitp -qu z4xs of a charged particle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particles of a certain velocity will move in a straight line. In the following, disregardw794y dttql- 1xu5xzui: ppn) the magnitudes of the fields. In a velocity selector, the particles move toward the east, and the magnetic field is directed to the north. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented pagq dzf zhw-5 u+ tz:fz,yqp.5k ydv:2/rallel to a uniform magnetivd::-yz+ dgzf t.q5ywqfhk,p 2/5u z zc field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current ofs v662 e45qr y5sjbahqewd5g ; 10 A in a direction of $30^{\circ}$ with respect to the direction of a 0.30-T magnetic field. Find the magnitude of the magnetic force on a 0.50-m length of the wire.

  What is the force per meter on a straight wimk7i erho-uojf1e + :+re carrying 5.0 A when it is placed in- f1o+o+:hku m eierj7 a magnetic field of 0.020 T? The wire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long b s+j0o-n; shc 3d( 7oocuy5wihas a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in ths wuo h b+s3;n(iodocyc50 7j-e rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 1j rme) rmp*lr8l-l3h0.20 T. What is the magnitude of the magnetic folhr-rm)1l* 8rjel 3pmrce on the proton?

  A proton moving at $4.0 \times 10^4 \; m/s$ horizontally enters a region where a magnetic field of 0.13 T is present, directed vertically downward. What force acts on the proton?

  An electron moves with a speed o wcqzkc1md8z- pog,8,ec,nze6z5.w of $5.0 \times 10^4 \; m/s$ perpendicular to a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic force on the electron?

  A proton travels at a speed ofbceo )2kmjj u(hy4b5q:zx 3;z $5.0 \times 10^7 \; m/s$ through a 1.0-T magnetic field. What is the magnitude of the magnetic force which acts on the proton if the angle between the proton's velocity and the magnetic field vector is $30^{\circ}$?

  An electron traveling jq3ne ;x2rz8gx2 vvy,due north with speed $4.0 \times 10^5 \; m/s$ enters a region where the Earth's magnetic field has the magnitude $5.0 \times 10^{-5} \; T$ and is directed downward at $45^{\circ}$ below horizontal. What force acts on the electron?

  An electron moves with a spe9p u0ma4 (ockc6i8f5 e i0nljpc7wayn 8:fb(ned of $8.0 \times 10^6 \; m/s$ along the +x axis. It enters a region where there is a magnetic field of 2.5 T, directed at an angle of $60^{\circ}$ to the +x axis and lying in the $xy$ plane. Calculate the magnetic force of the electron.

  An electron moves with nng 0os 1nju9m(45vdgv wj.,ga speed of $8.0 \times 10^6 \; m/s$ along the +x axis. It enters a region where there is a magnetic field of 2.5 T, directed at an angle of $60^{\circ}$ to the +x axis and lying in the $xy$ plane. Calculate the acceleration of the electron.

  A proton has a speedehz(eh(u -tm1 of $3.0 \times 10^6 \; m/s$ in a direction perpendicular to a uniform magnetic field, and the proton moves in a circle of radius 0.20 m. What is the magnitude of the magnetic field?

  A very long straight wire carries a current of 25 A. What is the z 6alsl-3o x lbxc8 ak92(0dxcmagnitude of the magneti2xb (9d6ll-c8o3 0xax kalcszc field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at1q. uv2yn+13 eb1u,odfj 0sps ougs 5z the ground, 10 m ,geqnu us3v.1 duo51j ypo+b1f 2zss0away?

  How much current musz8z e ot)o)wc4ptot2 ,t flow for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current of 5.0 A is t x;r6 -l*6cogfolf:hf he magnitude of the magncxf6 o;r6hl-:fgfo * letic field due to the wire equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directions. Theykd8cp3 6a; (s tmqeef8 are separated by 40 cm. What is the magnetic field icqad eftk(m6 e;s38p 8n the plane of the wires at a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A ind2t 4s2ufer z0x/uh.k opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway betx/zrsfkd224 uu 0h.etween the two wires?

  Two long parallel wire8 i3b;miypmk m4 i)800 nbjkcss carry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contrib p83 0ib 8y cm;0)4jmbiiknmskutions from the two wires the same?

  Four long parallel wires each carwz t :w11q)ocqry 2.0 A in the same direction. They are parallel):cq1owz1 t qw to the z-axis, and they pass through the corners of a square of side 4.0 cm positioned in the x-y plane. What magnetic field does one of the wires experience due to the other wires?

  Two long parallel wires carry currents of jk mhs cd1n7-+5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length between the two s+7d1cnh m-jkwires.

  What is the magnetic field at the center of a circular loop of wire of radius 4rj) 7hjhcv) k8.0 cm when a krj)8)vhch j7current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound wit3 5m0b1s9nhi uhnv d -h8kyc2ah 5000 turns of wire. What magnetic field is produced at the center of the solenoid when a current of 10 A flows?8b hu9v13 2ansidcmk5yhn0 h -

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. What s* +9(fj:jesfakl k1t0jgr)s ftrength of magnetic *rtl fj 0s+gff1 k ke(ja:s9j)field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generate ak7 xizr:2y:h-(zahwccvp8j6xd **hd 1.0-T magnetic field at the centea6z8hc:j-vy*xh2: wcrkipzxd h* d 7(r?

  How many turns should a 10-cm long so t43y*iv glxtdwb2tm 4ba9r.2lenoid have if it is to generate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangular loop of 120 turns that carries kkrze91ne3rzum .1( c 6.0 A if its dimensions are 4.0 cm x 8.0 zrn r1zu 9c3ekmk1 (.ecm?

  A circular loop of wire of rs9nd5v-y (6ef8vm e df6i)a dvadius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the pdedne f6(8safivvy65dvm) 9-lane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of crv(tc j;fvap48 .dv w+woss-sectional area $0.12 \; m^{2}$ consists of 200 turns, each carrying 0.50 A current. It is placed in a magnetic field of 0.050 T oriented at $30^{\circ}$ to the plane of the loop. What torque acts on the loop?

  A circular loop carrying a current of 2.0 A is in a magnetic fqzi a-yz ;-x+ k9adf;qield of 3.5 T. The loop has-z dya fqq-;i ;+zxka9 an area of $0.12 \; m^{2}$ and its plane is oriented at a $37^{\circ}$ angle to the field. What is the magnitude of the magnetic torque on the loop?

  A circular loop of wire of radius 0.50 m is in a uniform mmxpt*xo.g6b6g q:, fdagnetic field of 0.30 T. The current in the loop is 2.0 A. Whatf.x66ob,gpgq d :*mxt is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is vx5xt 0kj:hi4hwx5 (a in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of ix a0x(h54whtkv j:x5the loop is parallel to the magnetic field?

  A circular wire loop ofs,d*r d2uj(pd area $0.25 \; m^{2}$ carries a current of 5.0 A. The coil lies in a horizontal plane with the current flowing in the counterclockwise direction when viewed from above. At this point, the Earth's magnetic field is $1.2 \times 10^{-4} \; T$ directed $60^{\circ}$ below the horizontal. What is the magnitude of the torque which acts on the loop?

  In a mass spectrometer, a single-charged particle (charg +( eheu5g4o.,githj2dpik qt7:s y3fe e) has a speed of $1.0 \times 10^6 \; m/s$ and enters a uniform magnetic field of 0.20 T. The radius of the circular orbit is 0.020 m. What is the mass of the particle?

  A doubly charged ion with velocita8xgv50 fsrq+i mm:f-y $6.9 \times 10^6 \; m/s$ moves in a path of radius 30 cm in a magnetic field of 0.80 T in a mass spectrometer. What is the mass of this ion?

  A proton travels through a potential of 1.0 kV and then moves into a magnetic fvh 6w d9xhj/l38zzg i+ield of 0.040 T. Wh/z9 jvh6h 3+w8xlg zdiat is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic fimk.2e.9t(bomhc4rj 1n- q f daeld of 0.30 T oriented perpendicular to its direction of motion. Determine tk(j9qe mhbno1 tcd4m2r. . f-ahe radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV beohtk3wi0 le(fb wp*3,fore entering a velocity selector. If the f*t3hkwp 0lbe w3oi,(B-field of the velocity selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?